Replaceable plow share point



Sept. 28, 1954 R. c. FREVIK 2,690,112

REPLACEABLE PLOW SHARE POINT Filed Nov. 15, 1949 2 Sheets-Sheet lINVENTOR.

##1## C? fiR'V/A P 28, 1954 R. cfFREvlK REPLACEABLE PLOW SHARE POINT 2Sheets-Sheet 2 Filed NOV. 15, L949 'INVENTOR. Awz/w/ c: near/x PatentedSept. 28, 1954 UNITED STATES PATENT OFFICE REPLACEABLE PLOW SHARE POINTRalph C. Frevik, Detroit, Mich., assignor, by mesne assignments, to FordMotor Company, Dearborn, Mich., a corporation of Delaware ApplicationNovember 15, 1949, Serial No. 127,403

1 Claim. 1

This invention relates to an improved replaceable plow point formoldboard plows.

Heretofore, there have been a large number of constructions ofreplaceable plow points proposed, but no prior constructions have metwith any substantial degree of success, primarily because such pointswere either not adequately supported and secured on the plow, or thecost of the replaceable point so nearly approached the cost of the moreconventional integral share and point that the farmer did not realizeany substantial economic advantage in purchasing the replaceable points.

In accordance with this invention, the manufacturing cost of areplaceable point for a moldboard plow is substantially reduced due tothe virtual elimination of the gunnel portion of the replaceable point,i. e., that portion of the point which defines the landside face of theplow point and generally projects rearwardly a substantial distance fromthe extreme forward end of the plow point. Heretofore, such gunnelportion has generally been considered necessary to adequately supportthe cutting end of the plow point and, accordingly, has been formed withrelatively massive dimensions, thereby forming a substantial portion ofthe total cost of the replaceable point. However, in actual use, suchgunnel portion is subjected to little wear compared to the cutting faceof the plow point, so that when a farmer discarded a plow point becauseof wear of the cutting surfaces, he was discarding the relativelyunimpaired gunnel portion as well.

As indicated above, a replaceable plow point embodying this inventionsubstantially eliminates such gunnel portion and the forward end of thelandside of the plow is extended to underlie a substantial portion ofthe replaceable plow point and perform the supporting functions of theeliminated gunnel portion. Hence, in effect, substantially all of thematerial entering into a replaceable plow point embodying this inventionforms part of the wearing surfaces of the plow point and when a wornplow point is replaced, the farmer is not discarding a relatively unusedgunnel portion.

Still another feature of this invention is the provision of an improvedarrangement for effecting the rigid securement of a replacement plowpoint to a moldboard plow. A plurality of surfaces on the plow point arecaused to interlock with cooperating surfaces on the landside, the frogand the moldboard so that the plow point 2 is securely locked inassembly by a minimum number of bolts.

Accordingly, it is an object of this invention to provide an improvedplow point construction for a moldboard plow which can be securelymounted and supported on the plow and yet be conveniently replaceablewhen worn.

Another object of this invention is to provide unusually economicalreplaceable plow point constructions for a moldboard plow characterizedby the substantial elimination of the gunnel portion of the plow pointand the utilization of a forward extension of the plow landside toperform the supporting functions of the eliminated gunnel portion.

The specific nature of this invention, as well as other objects andadvantages thereof, will become apparent to those skilled in the artfrom the following detailed description, taken in conjunction with theattached sheets of drawings on which, by way of preferred example only,are illustrated various modifications of this invention.

On the drawings:

Figure 1 is a side elevational View of a moldboard plow from thelandside side, showing a replaceable point secured to the plow inaccordance with one modification of this invention.

Figure 2 is a plan view of the-forward end of the plow shown in Figure 1with the moldboard removed.

Figure 3 is an elevational view showing a modified manner of securingthe plow point to the extended landside wherein a dovetailed joint isutilized.

Figure 4 is a plan view of Figure 3.

Figure 5 is a cross sectional view taken along the plane 55 of Figure 3.

Figure 6 is a plan view of the forward end of a plow showing stillanother modification of this invention wherein the replaceable plowpoint is supported by an extended portion of the frog and the landside.

Figure 7 is a side elevational View of Figure 6.

Figure 8 is a sectional view taken along the plane 8-8 of Figure 6.

Figure 9 illustrates a further modification of this invention and is aside elevation view of the front end of a plow.

Figure 10 is a cross sectional view taken along the plane Ill-ill ofFigure 9.

Figure 11 is a cross sectional view taken along the plane l l! I ofFigure 1.

Figure 12 is a fragmentary plan View of Figlife 9.

As shown on the drawings:

Briefly, this invention comprises a replaceable plow point having anexterior contour shaped to blend with the contour of the share and themoldboard. The landside is provided with an extended tapered point whichis recessed in an interior pocket formed on the replaceable point andsuch point is removably secured to such extended landside portion. Thefrog is also extended and such extension cooperates with a recess in thereplaceable plow point whereby such point is also mounted on the frog.The share is arranged abutting relationship with the replaceable pointso that in cooperation with the landside, the replaceable point islocked against rocking movemerit and is thus rigidly secured to theplow.

lhere is shown in Figure l a plow construction comprising a moldcoardii; of conventional configuration secured. to a frog it and beam if? bya pair of bolts ii.

cg it below moldboard is by a pair of screws Share it is of conventionalconstruction but is without the usual share point, therebyforeshortening such share and the end thereof squared off shown at "illin Figure 2.

.pro provided with a forwardly projecting, tapering end portion 2i onwhich is mounteda replaceable plow point 21 Plow point 22 has n exteriorconfiguration substantially conforming to the shape of the conventionalintegral point. Point 253, however, is provided with a rearwardlyopening recess 23 so that such point be snugly slipped over theprojecting end portion ill of frog l6. Recess 23 also opens down wardly,as best shown in Figure 11. Point 2f is provided with a squared endsurface 2 which outs the end surface of share it. A second recess 25,which communicates with recess it, is provided on the landside face ofpoint 22 for a purpose to be presently described.

A landside member 28 is secured to frog it on the side oppositemoldboard by a pair of screws Landside 2e is provided with a taperedfront end portion 28 as shown in Figure l. The recess 25 in the landsideto snugly receive the tapered end portion of landside 26. The upper topsurface 29 of the front end portion of landside 26 abuts a shoulder 3E9defined by recess 25. A transverse screw ti inserted in a suitable holein the forward end of the end portion 28 of landside 26 engages athreaded hole 32 in point 22 to secure point 22 to the tapered endportion of landside it. Also, a screw 33 is provided to secure point 22to frog it as shown in parent that the abutment of the upper surface 29-of the tapered end portion of landside 2% with shoulder 39 in point 22and the abutment of the end of share it with point 22 substantiallyelimi-- nates any possibility of rocking of point 272 when mounted onthe plow. Screws 3! and i3 permit rapid and convenient disassembly ofthe point 22 from the plow to permit replacement thereof when such pointis worn beyond use.

In Figures 3, 4 and 5, there is illustrated a modification of thereplaceable point shown in Figures 1 and 2 wherein a tapered dovetail isprovided on the landside which engages a corresponding dovetailed slotprovided in the replaceable point. The elements of the plow shown inFigure 2 correspond to those shown in Figures 1 and 2; however, in thisinstance, the landside 26 of this modification is provided at itsforward end with a wedge-shaped point 34 having dovetail or bevelededges, as best shown at 35 in Fig- A share I8 is secured to face of plowpoint 2?; is shaped Figure 2. Thus, it is readily apmoldboard 5T.

ure 5. A dovetailed slot 36, which communicates with the frog receivingrecess 23, is provided in the landside face of point 22 and correspondsin shape to the dovetailed end of landside A screw 31 in the forward endof wedge-shapel point 34 secures point 22 to landside As in thearrangement shown in Figures 1 and 2, the landside and share in thisconstruction rigidly supports the point 22 against rocking or otherdisplacement.

A further modification of a replaceable plow point embodying thisinvention is shown in Figures 6, '7 and 8. In such modification, thefrog 38 is provided with an extended substantially wedge-shaped toeportion as. A shortened share 40 is secured to frog 38 by a plurality ofscrews ll and such share has a squared front end sur face 4.2 whichabuts a corresponding rear surface isa on replaceable plow point 13.Plow point ts is provided with a wedge-shaped recess at corresponding inshape and size to toe portion 39 of frog 38 for mounting the point onsuch toe portion. In contrast to the other modifications of thisinvention, recess M has a bottom wall (Figure 8). The plow point 43assembled to toe portion 39 by sliding such point over the toe portion39 and tapping the end of the point as with a hammer, whereby such toeportion is tightly wedged in recess M. A bolt secures point 43 to frog38 as shown in Figure 8. The landside face of point ts is recessed asshown at to in Figures 6 and '7 to receive a slightly reduced endportion ii of a landside 38. Landside is is secured to frog 38 by screwsQ9. lhe tapered end portion ll of landside ie snugly fits within therecess provided in point The upper surface 5! of end portion ll abuts ashoulder defined by recessed surface it to additionally support pointQ3. The abutment of share so point 43 completes the locking arrangementthus effectively preventing rotation of the point.

In the modification shown in Figures 9 lo, the landside 53 is providedwith a forwar vly e: tending end portion 5a of L-shaped CO1 1 tion, asbest shown in Figure 10. A replaces, is point 55 is provided which ismountable on frog 56, in much the same manner as described in themodifications shown in Figures and placed adjacent a share (not shown)In this modification, however, the landside surface of point 55 isrecessed and the bottom surface of point 55 is also re to receive theL-shaped end M- of the landside in order that the point 55 will be flushwith the landside on both the side and bottom of the front portion 53thereof. A screw 58 vertically disposed in the bottom portion of the Lshaped end 54 of the landside fastens point to such extended end portion5 Three screws secure landside 53 to frog 56. As in the previouslydescribed modifications, the upper surface cf he forward landsideportion t l abuts the shou defined by the recessed surface hi in pointsecurely lock point to against rotation.

From the foregoing description, it is clearly apparent that there ishere provided a replace" able plow point for a plow which may be readilyand conveniently assembled to a plow of the moldboard type and, whenassembled, is positively locked against the various forces acting on thepoint in plowing by the cooperating abutment of surfaces of the landsideand share with the point.

It will, of course, be understood that many details of construction maybe varied through a wide range without departing from the principles ofthis invention and it is, therefore, not the purpose to limit the patentgranted hereon otherwise than necessitated by the scope of the appendedclaim.

I claim:

In a plow the combination of a frog provided with angularly disposedmoldboard and landside surfaces, a landside, means for mounting saidlandside on said landside surface of said frog, said landside having atip portion extending forwardly beyond said frog, said tip portionhaving an L-shaped vertical cross-section, a share Wing, means forsecuring said share wing to the moldboard surface of said frog with itsforward edge disposed rearwardly of the forward end of said frog, areplaceable share point having a recess for receiving the forward edgeof said frog, said share point having a rearward edge surface, means forsecuring said point to said frog with its rearward edge surface inabutment with the forward edge of said share wing, said share pointhaving recesses respectively on its landside face and its adjacentbottom face constructed and arranged to receive said L-shaped extendingtip portion of said landside in flush relationship therein, therebyrigidly supporting said plow point, and bolt means traversing each faceof said L-shaped extended tip portion for remcvably securing said sharepoint to said extended tip portion.

References Cited in the file of this patent UNITED STATES PATENTS NumberName Date 245,429 Ball Aug. 9, 1881 578,181 Wroten Mar. 2, 18971,048,962 Harrison Dec. 31, 1912 1,140,275 Mares May 18, 1915 1,155,917Grubb Oct 5, 1915 1,559,066 Bohmker Oct. 27, 1925 FOREIGN PATENTS NumberCountry Date 227,371 Great Britain Jan. 15, 1925

